Type-writer key and type-bar mechanism.



, J. ALEXANDER. TYPE WRITER KEY AND TYPE BAR MECHANISM. ADPPLIOATIOII FILED JAN. 6, 1009. RENEWED 001'. a. 1910.

Patented Dec. 13, 1910.

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igi-F11 c as an ZTZZ/ 54/ APPLICATION FILED JAN. 5, 1909. RENEWED OUT. 8, 1910.

m r mm we 3' mid 8 1 8 an ma m 7K D 0M Z W n fiw 9 Q f e a 86 P am enf- J q filirl emeo Zip/z r 30 the result, within the scope of my invention! is so arranged that the said connection will -take up the actuation of the bell-crank lever 15 after the same has been moved 'a portion of its travel by the hookconnection 262T.-

5 W'ith this means the latter portion of the stroke of the type-bar will be sutiiciently I accelerated to enable the type to deliver a firm printing impression, while at the same time, inasmuchas the actuation of the typemm!- is taken up by the pin. and slot connec-- tion after the bar-is well under way, the i change to such accelerated actuation will he i substantially imperccptible to the operator; 3 In order to provide for quick return of l the type-bar immediately after the printing impression, the-actuating link 21 provided with a pin or stop-shoulder 28 with which the extension 27 of the bell-crank 13 engages at the completion of the printing stroke, which connection serves to impart initial re p. turn movement to the hell-crank lever 15 and to the type-bar 10, as will be evident from an inspection of the relative position of the parts illustrated in Fig. 2. While I have here shown the pin or shoulder 28 mounted upon the link 21, arranged to contact with the projection 27-,---it is to be underi istood that these parts may be arranged in v3 any other desired manner which will elfect While I have here shown a preferred embodiment of my invention, it is understood that the same maybe varied in detail ahd arrangement of partswithout departing from v the spirit and scope thereof.

What I claim is:

1. In typewriter" key and type-bar mechanism, a typehar, a key lever, a bell-crank actuating lever for said type-ban'an actuat- (0 ing link connecting said hell-crank lever with said key lever, a connection between said link and said hell-crank lever located at a considerable distance from the pivot return of the type-bar.

In typewriter key and type-bar mechanism, a typebar, a key lever, a bell-crank actuating lever having one of its arms connected with said type-bar, an actuating link connected with the other arm of said bellcrank lever and with said key lever, and having a hooked portion to engage over the extremity of said arm leaving said armotherwise free and a'lost motion-connection located between said hooked connection and the pivot of said bellcrank lever to effect accelerated movement of said ty -ba1'.

. 3. In typewriter key and ty 'ie-liz ir mechanism, a type-bar, a key lever, a bell-crank lever having one arm connected with said typefbar, an actuating link connecting the other arm of said bell-crank lever ,witlr-sa'i d key lever, a hook'on'said link; arranged to 70 engage over the extrelnit 'of said arm leaving saidarm otherwise ree, and a lost motion connection between said-link-andsaid arm located intermediate ofvthe'hooked con nection and y the iv'Qt .point .;of said bellcranklever t'o' prodhce*aeceleratedfmovement I of said type-bar during theprinting stroke, and a shoulder on said link apart from said connections and adaptedtoengage said bell l crank lever to effect quick return of the typebar after the "printing stroke.

JESSE ALEXANDER.

Witnesses: f

' Case. A. Pmb,

M. E. G. .nnm'r. 

